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394 



H 



N A 



R A 



H 



R 





ECHINUS 3. Minor rotundas, acideh longiJJImis variegatis. 



The fmall round Sea-Egg with long variegated prickle 





ECHINUS 4. Minor oblongus tuberculatum & fella tus t radii s fella inaqua- 



libus. 



The fmall oblong Sea-Egg. 



ECHINUS 5. Major fubrotundus, front e deprejdfulcatd. 



The larger roundifh Sea-Egg with a furrow in the fore-part, 



ECHINUS 6. Major fubcomprejjus, tejid areolatd & Jlellatd. 



The larger moderately comprefled Sea- Egg. 



ECHINUS 7. Maximus fubrotundus comprejftts, t eft d jlellatd & areolatd \ 



aculeis minimis. 



The Sea-Plate, or flat Sea-E 



All thef. 



e 



knov 



up by the fea 



ber c 



of the Echinus are freq 



about y, 



d all well 



pt the two laft which are more rare than the reft, being feldom th 



The (hells or crufts of thefe 



furnifhed with a vaft num. 



f fmall (lender prickles, and marked into oblong ang 

 y large and flat, and its cavity divided into many lodges, 



:gular cavernous p 



and. like the fixth. fifth 



bu 

 Tib 



ft 



f 



jr 



d fourth, has both the 



d 



clafs. 

 mule 



umberlefs fer 



the under fide. It is alfo perforated, like the reft of 



f 



holes 



thefe embrac 





th 



e 



cks 



f the 



hich it emits fo many 



le 



P 



d 



move them very regularly on the correfpondent protuberances, to which they are 

 adapted by the mallow lockets at their bafes, and held by other convenient faften- 



mgs. 



The ftar of the (hell is a little prominent, and the whole mafs covered 

 y fmall prickles ordenticles on both fides 





ORDER 



IV. 





Of fitch as are furniflied with convenient pliable limbs, and form a?id live conflantly 



in jeparate fingle cells of a jloney texture and conjiJle?ice. 



TH E productions of this clafs are commonly known by the name of fhell-fim ; 

 and the waters, in which moft of the forts are found, cover fo 



_ reat a part 



of the earth, and extend to fo many regions without interruption, that we need 



only to confider the compafs of them, to form a juft idea both of the number and 

 variety of the inhabitants. They are indeed numerous beyond conception, and 

 many of them fo curious, that few can obferve them without admiration ; yet we 

 are fo little acquainted with the creatures themfelves, that we mould probably 

 have never known there had been more than a few fpecies in being, had not their 

 more lafting receptacles furnifhed us with an idea of the inhabitants ; and hence it 

 is that we are neceflitated to clafs the infects themfelves 



the appearance and 



fimilitude of their manfions, which however muft probably bear fome refemblance 

 to the inhabitants by whom they are moulded. 



Thefe receptacles, as to their ufes to us in life, are indeed a very infignificant part 



r we coniider the number of them, and that each ferves 



of the creation 



but 



if 



to preferve an animated being; if we confider the variety of their forms and con- 

 figurations, or the luftres and more various colours with which ;hey are 



adorned, 



*■ 



